น้ำกะทิทับทิมกรอบ

น้ำกะทิทับทิมกรอบ: Easy Thai Coconut Milk Dessert (Tub Tim Grob) for Beginners

Introduction

น้ำกะทิทับทิมกรอบ is a classic Thai dessert that translates to “coconut milk with crunchy rubies” — known in English as Tub Tim Krob. This refreshing, colorful sweet combines chewy, ruby-red water chestnuts coated in tapioca flour with rich, lightly sweetened coconut milk and crushed ice. Perfect for hot days and impressive for guests, น้ำกะทิทับทิมกรอบ is surprisingly simple to make at home, even for beginners. In this recipe I’ll walk you through clear steps and practical tips so you can enjoy an authentic Thai treat.

Ingredients

• 1 (8–10 oz / 225–280 g) can water chestnuts, drained and cut into 1/2-inch (1 cm) cubes (or 250 g fresh)
• 1/2 cup (70 g) tapioca flour (tapioca starch), plus extra for dusting
• 1–2 tablespoons rice flour or all-purpose flour (optional, helps texture)
• 4–6 drops red food coloring (or natural beet/rose syrup for color)
• 4 cups (1 L) water for boiling
• Ice cubes or crushed ice, to serve
• For the sweetened coconut milk:
• 1 can (400 ml) full-fat coconut milk
• 1/3 cup (65 g) granulated sugar (adjust to taste)
• 1/4 teaspoon fine sea salt
• 2 pandan leaves, knotted (optional — adds fragrance)
• For the simple syrup (optional, to sweeten further): 1/2 cup (100 g) sugar + 1/2 cup (120 ml) water, simmered until sugar dissolves

Instructions

1. Prepare the water chestnuts: Drain and pat the water chestnut cubes dry. Place them in a mixing bowl and add the red food coloring. Toss gently until all pieces are evenly colored. If using natural coloring, coat similarly.
2. Coat with tapioca flour: Sprinkle 1/2 cup tapioca flour and the rice or all-purpose flour (if using) over the colored chestnuts. Toss until each piece is evenly coated. The coating should form a thin layer — add a little more tapioca flour if needed, but avoid making the pieces heavy.
3. Heat the boiling water: In a medium pot, bring 4 cups of water to a rolling boil.
4. Cook the “rubies”: Carefully drop the coated water chestnuts into the boiling water in batches so they don’t stick together. Stir gently to prevent sticking. Once they float and the coating turns translucent (about 1–2 minutes after floating), remove them with a slotted spoon and plunge immediately into a bowl of iced water to stop cooking and keep them chewy.
5. Make the coconut milk mixture: In a small saucepan, combine coconut milk, sugar, salt, and pandan leaves (if using). Warm gently over medium-low heat, stirring until sugar dissolves. Do not let it boil vigorously — a gentle simmer is fine. Remove pandan leaves and let the coconut milk cool. Chill in the refrigerator for best results.
6. Optional simple syrup: If you like extra sweetness, prepare the syrup by simmering 1/2 cup sugar with 1/2 cup water until the sugar dissolves. Cool before serving.
7. Assemble and serve: Drain the cooled rubies. Place a generous spoonful (about 1/3–1/2 cup) of the rubies into a serving bowl, add crushed ice or ice cubes, drizzle with sweetened coconut milk, and a little simple syrup if desired. Serve immediately.

Cooking Tips for Perfect น้ำกะทิทับทิมกรอบ

These practical tips make a big difference when making น้ำกะทิทับทิมกรอบ at home:

• Use tapioca flour (starch) — it gives the signature translucent, chewy coating. All-purpose flour will not produce the same texture.
• Work quickly when coating and cooking the chestnuts to prevent the coating from becoming soggy.
• Boil in batches so the rubies move freely and cook evenly.
• Shock in ice water immediately after boiling to set the texture and keep them springy.
• Adjust sweetness of the coconut milk to your preference. The coconut should taste slightly sweet and a little salty — that balance makes the rubies pop.
• If you prefer natural coloring, try beet juice or roselle (sour rosella) syrup, but remember color intensity may vary.
• Make ahead: Cooked rubies can be stored in a little simple syrup in the fridge for 1–2 days. Coconut milk is best made fresh or stored separately and chilled.

Nutritional Information

Below are approximate nutrition estimates per serving (recipe yields about 4 servings). These values are estimates and can vary based on exact ingredients and portions.

• Calories: ~220–280 kcal per serving
• Carbohydrates: ~30–40 g (mainly from sugar and tapioca)
• Fat: ~10–18 g (from coconut milk)
• Protein: ~1–2 g
• Sugar: ~18–30 g (depends on added syrup and coconut milk sweetness)
• Notes: Use light coconut milk or reduce added sugar to lower calories and fat.

Conclusion

น้ำกะทิทับทิมกรอบ is a vibrant, cooling Thai dessert that’s easy to make at home. With simple ingredients like water chestnuts, tapioca flour, and coconut milk, you can create a restaurant-quality treat that’s perfect for summer or any time you crave something sweet and refreshing. Follow the steps and tips above, and soon you’ll be serving up beautiful bowls of น้ำกะทิทับทิมกรอบ to family and friends.